"Beetle-inspired liquid crystals revolutionize QR code security"

Researchers have developed a method for processing cholesteric liquid crystals (CLCs) into micrometer-sized spherical particles, which can be combined with pigments to create a unique anti-counterfeiting QR code that can only be displayed under a specific circular polarizer. The development of these spherical CLC particles opens up possibilities for low-cost structural color functions and applications beyond anti-counterfeiting.